/**
 *  Copyright (C) 2021 Huawei Device Co., Ltd.
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package at.favre.lib.armadillo;

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

public class RandomUtil {

    private static final String ALGORITHM = "SHA1PRNG";

    public static int nextInt(int bound) {
        return getRandom().nextInt(bound);
    }

    public static long nextLong() {
        return getRandom().nextLong();
    }

    public static float nextFloat() {
        return getRandom().nextFloat();
    }

    public static boolean nextBoolean() {
        return getRandom().nextBoolean();
    }

    private static SecureRandom getRandom() {
        try {
            return SecureRandom.getInstance(ALGORITHM);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }
}
